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INFARCTION (PATHOGENESIS (ARTERIAL NARROWING (CAUSES ISCHAEMIA, DUE TO:…
INFARCTION
PATHOGENESIS
ARTERIAL NARROWING
CAUSES ISCHAEMIA
DUE TO: ENDARTERITIS OBLITERANS
DUE TO: ATHEROMA
VENOUS OCCLUSION
THROMBOSIS
ARTERIAL OCCLUSION
THROMBOSIS
EMBOLISM
TYPES
RED HAEMORRHAGIC INFARCT
RED SWOLLEN NECROTIC TISSUE BCOZ OF PLENTY RBCs
THIS TYPE OF INFARCT IS SEEN IF:
HIGH ANASTOMOTIC BLOOD SUPPLY
REPERFUSION OF INFARCTED TISSUE
TISSUES HAS DUAL BLOOD SUPPLY
THERE'S FORMER CONGESTED TISSUES
SEPTIC INFARCT
MAY BE DUE TO:
SEPTIC EMBOLUS
BACTEREMIC SEEDING
PRIOR BACT. INFECTION
PROLIFERATION OF COMMENSALS TO INFECT NECROTIC TISSUE
WHITE/PALE INFARCT
COMPLETE OCCLUSION OF ARTERIAL SUPPLY
STARTS AS HAEMORRHAGIC AREA BCOZ DESTRCUTION OF BV RELEASES RBCs
RBCs LYSE FOR 24-48 HOURS THEN AREA BECOMES PALEWHITE
LOCALIZED AREA OF ISCHAEMIA IN ORGAN/TISSUE DUE TO BLOOD VESSEL OCCLUSION